Vb2 acc

Just one question.

The PSD file says you calculate the ACC by time difference in seconds of the targeted ball speed.
What will be the targeted ball speed?
When it is +/- one second, or when you can see it slow down.

Ofcourse I means .PDF file ;D
Is there even anyone active at this section?

At the times you want to predict.
But that will give you only an indication about the time.

The best is to do it 2 times during the same spin and check.
If the time is correct prediciton needs tobe same.